Second issue. Comprises letters 46 and 47 sent to the Royal Society. "Collected letters of the Dutch pioneer in microscopy, the first to describe bacteria, red blood corpuscles, spermatozoa"(Horblit 65). "The fourth great founder of microscopic biology, the largely self-taught Dutchman Antoni van Leeuwenhoek discovered bacteria and studied the structure of wood and seeds, he sent the first of his many botanical letters to the Royal Society in August 1675" (E. L. Greene, Landmarks of Botanical history p. 973). Dobell 7a.